2. 外语
  3. Summer School and Online Classes In the United States,【T1】______ for high school students【T2】______. But【T3】______.【T4】_____

Summer School and Online Classes In the United States,【T1】______ for high school students【T2】______. But【T3】______.【T4】_____

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问题     Summer School and Online Classes
    In the United States,【T1】______ for high school students【T2】______. But【T3】______.【T4】______so【T5】______during the school year. Or【T6】______to choose the classes they want【T7】______.
    Summer school students【T8】______ work【T9】______during the school year.【T10】______.
    Another choice for many students【T11】______. However,【T12】______. Students may also 【T13】______. And there may be 【T14】______each day. Yet there may also be 【T15】______, day or night.
【T14】
选项
答案a required number of hours to spend logged on
解析
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